MDB Ventures Preoctal Radio Vacuum Tubes


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Don't see what you need? Contact us. We have many more tubes that are not yet listed. We also have new and good used tubes in most other numbers including preoctal, globe/balloon, octal, loctal/loktal, miniature, subminature, metal, power, transmitter tubes and many more.

MDB Ventures Preoctal Tubes
Qty
Avail
Tube
Type
Price
Each
Tube
Brand
Emission
Strength
Mutual
Conduct

Desc

Notes
1 2A5 $25.00 Raytheon 120% 2000 / 1640Gm ST - NOS (wb) (H) four pillar tube - engraved base - grid clip
1 2A5 $14.00 Tung-Sol 120% 3000 / 1640Gm ST - NOS (OB) (H)black coat - grid 'c' clip
1 2A5 $14.00 RCA Radiotron 120% 2400 / 1640Gm ST - NOS (wb) (H) engraved base - grid 'c' clip
1 2A5 $14.00 RCA / Cunningham 120% 3000 / 1640Gm ST - NOS (wb) (H) grid 'c' clip
1 2A5 $14.00 Sylvania 120% 2400 / 1640Gm ST - NOS (wb) (H) grid 'c' clip - green lettering
1 2A5 $14.00 Philco 120% 2400 / 1640Gm ST - NOS (wb) (H) engaved base - grid 'c' clip
1 2A5 $13.00 Delco 120% 2100 / 1640Gm ST - NOS (OB) (H) damaged box - grid 'c' clip
1 2A5 $15.00 RCA Victor 110% 2000 / 1640Gm ST - NOS (OB) (H) sealed in box
1 2A5 $14.00 RCA 120% 3000 / 1640Gm ST - NOS (wb) (H) grid 'c' clip - red lettering
1 2A5 $14.00 GE 120% 3000 / 1640Gm ST - NOS (OB) (H) grid 'c' clip
1 2A5 $14.00 Sylvania 130% 2500 / 1640Gm ST - NOS (wb) (H) grid 'c' clip - green lettering
1 2A5 $14.00 RCA 130% 3000 / 1640Gm ST - NOS (OB) (H) grid 'c' clip - red lettering
1 2A5 $14.00 RCA / Cunningham 120% 2200 / 1640Gm ST - NOS (wb) (H) engraved base - grid 'c' clip
1 2A5 $12.00 Sylvania 100% 2800 / 1640Gm ST - NOS (wb) (H) grid 'c' clip - green lettering
1 2A5 $13.00 Arcturus 130% 3300 / 1640Gm ST - NOS (OB) (H) damaged box - grid 'C' clip
1 2A5 $14.00 Sylvania 140% 2400 / 1640Gm ST - NOS (wb) (H) grid 'C' clip
1 2A5 $14.00 Delta 120% 3000 / 1640Gm ST - NOS (wb) (H) black coat - grid 'C' clip
1 NU-2A5 $7.00 National Union 120% 2600 / 1640Gm ST - used (wb) (H) engraved base - grid 'c' clip
1 2A5 $7.00 Tung-Sol 110% 3200 / 1640Gm ST - used (wb) (H) black coat - grid 'c' clip
1 2A5 $6.00 Tung-Sol 110% 2100 / 1640Gm ST - used (rb) (H) damaged box - cat:401-579 - grid 'c' clip
1 2A5 $6.00 RCA 110% 3000 / 1640Gm ST - used (OB) (H) damaged box - red lettering - grid 'c' clip
1 2A5 $7.00 Sylvania 120% 2300 / 1640Gm ST - used (wb) (H) grid 'c' clip - green lettering
1 2A5 $7.00 National Union 120% 3400 / 1640Gm ST - used (wb) (H) engraved base - grid 'c' clip
1 2A5 $5.00 RCA / Cunningham 100% 2200 / 1640Gm ST - used (OB) (H) grid 'c' clip - damaged box - cat:401-576
1 2A5 $6.00 Sylvania 100% 1800 / 1640Gm ST - used (OB) (H) engraved base - grid 'c' clip (pl)
1 2A5* $6.00 Ken-Rad 105% 2000 / 1640Gm ST - used (rb) (H) black coat - grid 'c' clip
1 2A5 $7.00 National Union 110% 2500 / 1640Gm ST - used (L) (H) gray coat - grid 'c' clip
1 2A5 $7.00 RCA / Cunningham 120% 2200 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 2A5 $7.00 Triad 110% 2500 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 2A5 $7.00 Sylvania 110% 2200 / 1640Gm ST - used (L) (H) engraved base
1 2A5 $6.00 National Union 100% 2000 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 2A5 $7.00 RCA / Cunningham 130% 2800 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 2A5 $7.00 National Union 110% 1900 / 1640Gm ST - used (L) (H) gray coat - grid 'c' clip
1 2A5 $4.00 Sylvania 110% 2800 / 2000Gm Used good (ST) cracked base - rattle in base - grid 'c' clip - green lettering
1 2A5 $7.00 Sylvania 110% 3000 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 NU-2A5 $5.00 National Union 90% 2000 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 2A5 $5.00 RCA Radiotron 90% 2200 / 1640Gm ST - used (L) (H) engraved base - tubular grid clip
1 2A5 $5.00 Super Airline 90% 2100 / 1640Gm ST - used (L) (H) black coat - grid clip
1 2A5 $4.00 Ceco 85% 2200 / 1640Gm ST - used (L) (H) gray coat - grid 'c' clip
1 2A5 $5.00 RCA Radiotron 90% 1600 / 1640Gm ST - used (L) (H) engraved base - grid 'c' clip
1 2A6 $14.00 National Union 110%: diodes 110% / 100% 800 / 750Gm ST - NOS (OB) --
1 2A6 $14.00 RCA 140%: diodes 110% / 110% 950 / 750Gm ST - NOS (OB) --
1 2A6 $13.00 RCA 150%: diodes 110% / 110% 900 / 750Gm ST - NOS (OB) torn box flap
1 2A6 $13.00 RCA 150%: diodes 110% / 110% 1050 / 750Gm ST - NOS (OB) damaged box
1 2A6 $15.00 GE 140%: diodes 110% / 110% 900 / 750Gm ST - NOS (OB) sealed in box
1 2A6 $14.00 Tung-Sol 150%: diodes 110% / 110% 900 / 750Gm ST - NOS (OB) --
1 2A6 $15.00 National Union untested untested ST - NOS (OB) sealed in box
1 2A6 $14.00 Raytheon 140%: diodes 110% / 110% 900 / 750Gm ST - NOS (wb) --
1 2A6 $14.00 Tung-Sol 120%: diodes 110% / 120% 750 / 750Gm ST - NOS (wb) --
1 2A6 $14.00 Sylvania 130%: diodes 110% / 110% 850 / 750Gm ST - NOS (wb) engraved base
1 2A6 $14.00 Sylvania 120%: diodes 110% / 110% 950 / 750Gm ST - NOS (wb) --
1 2A6 $7.00 RCA 140%: diodes 110% / 110% 900 / 750Gm ST - used (L) --
1 2A6 $7.00 RCA / Cunningham 110%: diodes 110% / 110% 750 / 750Gm ST - used (rb) engraved base
1 2A6 $7.00 Sylvania 90%: diodes 110% / 110% 600 / 750Gm ST - used (L) cat:312-1
1 2A6 $7.00 RCA 150%: diodes 110% / 110% 900 / 750Gm ST - used (L) JAN
1 2A6 $7.00 Super Silvertone 110%: diodes 110% / 110% 700 / 750Gm ST - used (L) cat:312-215
1 2A6 $7.00 Raytheon 110%: diodes 110% / 110% 750 / 750Gm ST - used (L) cat:312-213
1 2A6 $6.00 CeCo 100%: diodes 110% / 110% 700 / 750Gm ST - used (L) --
1 2A6 $7.00 Super Silvertone 110%: diodes 100% / 110% 600 / 750Gm ST - used (L) engraved base
1 2A6 $6.00 RCA / Cunningham 100%: diodes 110% / 110% 650 / 750Gm ST - used (L) engraved base

Notes:
(OB) = original box, (rb) = relabeled/replacement box, (wb) = white box, (L) = loose (no box), (pl) = paper label on tube (original or third party)
(H) = tested on Hickok 539A
ST=ST Style, GT=GT Style, JAN = Military
Emission Strength = Percentage of emission measured on Eico 666 tube tester
(Emission Strength = 100% baseline reference, >80%:good, >60%:fair >40%=diode good).
Gm = Mutual conductance measured on Hickok 533 tube tester; Except (H)=tested on Hickok 539A
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).


How To Order:

Purchasing our preoctal tubes is easy.
Just send us an email indicating the tubes (including quantities) you want.
We will let you know the total price including shipping and handling.

Shipping and Handling Information

Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com

Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.


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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com